DTC P2227 BAROMETRIC PRESSURE TOO LOW
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DTC P2227 BAROMETRIC PRESSURE TOO LOW
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Detect the malfunction of atmospheric pressure
sensor output property. Judge NG when the atmospheric pressure sensor
output is largely different from the intake manifold pressure at
engine starting.
Atmospheric pressure sensor is built in ECM.
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Secondary
Parameters
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Enable
Conditions
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Engine
speed at engine starting
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< 300
rpm
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Vehicle
speed
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< 1
km/h (0.62 MPH)
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Diagnosis
for atmospheric pressure sensor property
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Not finished
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Perform the diagnosis once turning the ignition
switch to ON.
Abnormality Judgment
Judge NG when the continuous time of completing
the malfunction criteria below becomes more than 0.33 seconds.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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|Atmospheric − manifold
absolute pressure|
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≥ 26.7
kPa (200 mmHg, 7.88 inHg)
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|Intake
manifold pressure at engine starting − manifold absolute
pressure|
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< 1.33
kPa (10 mmHg, 2.95 inHg)
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Time Needed for Diagnosis:
0.33
seconds
Malfunction Indicator
Light Illumination:
Detect when malfunction occurs in 2 continuous
driving cycles.
Normality Judgment
Judge OK and clear the NG when the continuous
time of completing the malfunction criteria below becomes more than
0.26 seconds.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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|Atmospheric − manifold
absolute pressure|
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< 26.7
kPa (200 mmHg, 7.88 inHg)
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|
•
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When the OK idling cycle was completed 40 times
in a row
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•
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When “Clear Memory” was
performed
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MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
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•
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When the OK driving cycle was completed 3 times
in a row
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•
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When “Clear Memory” was
performed
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Atmospheric pressure sensor process: Fix
the atmospheric pressure to 101 kPa (760 mmHg, 29.8 inHg).
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ECM OPERATING
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
